// Thud - a dynamic object-oriented language
// Copyright (C) 2009,2010 David H. Hovemeyer <david.hovemeyer@gmail.com>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/*
 * PushbackReader.cpp
 *
 *  Created on: Dec 25, 2009
 *      Author: dhovemey
 */

#include "util/PushbackReader.h"

PushbackReader::PushbackReader(Reader *delegateToAdopt)
	: m_delegate(delegateToAdopt)
{

}

PushbackReader::~PushbackReader()
{
	delete m_delegate;
}

long PushbackReader::readChar()
{
	if (!m_stack.empty()) {
		long result = m_stack.back();
		m_stack.pop_back();
		return result;
	} else {
		return m_delegate->readChar();
	}
}

void PushbackReader::pushBack(wchar_t c)
{
	m_stack.push_back(c);
}
